JPH0351499Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Field of Application) This invention relates to a door opening/closing device installed on, for example, a box-shaped loading platform of a freight transport truck.

(Prior Art) Generally, a box-shaped loading platform of a cargo transport truck is provided with a pair of doors for opening and closing the rear opening, and a locking bar provided on the outside surface of one door is attached to the outside surface of the other door. The pair of doors were locked in a closed state by being locked with the provided locking member.

(Problem to be solved by the invention) However, in conventional box-shaped cargo platforms, the door could only be opened by detaching the locking bar from the locking member on the outside of the door. There was a risk of being trapped inside the storage compartment of the loading platform.

This invention was made to solve the above problems.

Structure of the device (means for solving the problem) In order to solve the above problem, this device has a pair of doors 4 and 5 that close the opening 2 of the storage chamber, as shown in FIG. A locking rod 11 is provided on the outer surface of one of the doors 4, and a locking member 16 for locking and holding the locking rod 11 is provided on the outer surface of the other door 5. Depending on the situation, the pair of doors 4 and 5 are locked in a closed state.

The locking member 16 is detachably attached to the other door 5, and the inner surface of the other door 5 is provided with a first position for holding the locking member 16 in the attached state with respect to the door 5, and a locking member 16 at a first position. is movable between a second position in which the stop member 16 is in a state where it can be removed from the door, and is in a horizontal position in the first position;
By moving upward from the first position, the second
An operating member 31 is provided which is moved to the position shown in FIG.
Further, a cover body 39 is provided to cover the operation member 31 and hold it in the first position, and the cover body 39 has one end located outside the movement range of the operation member 31 and the cover body 39 has one end outside the movement range of the operation member 31. The cover body 39 is connected to the door 5 so as to be rotatable in a direction perpendicular to the surface thereof, and a connecting piece 40 that is detachable from the operating member 31 is provided on the cover body 39 .

(Function) With the above configuration, in this invention, the operating member 31 is moved to the first After moving from the position to the second position, if the other door 5 is pressed from inside, the locking member 16 is released from the other door 5 and both doors 4.5
The locked state can be easily released, and even if a person is accidentally trapped in the containment chamber, he or she can easily escape.

Further, normally, when the connecting piece 40 of the cover body 39 is engaged with the operating member 31, the operating member 31 and the cover body 39 are not moved in the direction of gravity. The locking member 16 will not come off due to interference from objects placed in the loading platform 1, and therefore the locking member 16 will not come off the door 5 inadvertently. Furthermore, since the operating member 31 and the cover body 39 are engaged with each other by the connecting piece 40, the operating member 31 is reliably positioned without wobbling.

(Example) The first example that embodies this idea will be described below.
This will be explained with reference to FIGS. As shown in FIG. 2, an opening 2 is formed at the rear of a box-shaped loading platform 1 of a cargo transport truck constituting a storage room.
A pair of left and right doors 4 and 5 are attached to the periphery of both sides by a plurality of screws 3 so that they can be opened and closed at each outer edge, and the inner edge of the right door 4 is overlapped on the inner edge of the left door 5. The opening 2 can be closed in the aligned state. On the outer surface of the right door 4, near the inner edge, a vertically extending shaft 6 is rotatably supported by a plurality of shaft support pieces 7, and locking claws 8 (only one ) is provided. At the peripheral edge of the opening 2, corresponding to each locking claw 8, a locking protrusion 9 with which the locking claw 8 can be engaged and released.
is installed. Then, by rotating the shaft 6 in a predetermined direction with the right door 4 in the closed position, the locking pawl 8 is engaged with the locking protrusion 9, and the right door 4 is placed in the loading platform 1. It is becoming more and more locked down. Further, the restriction ring 10 on the shaft 6 is engaged with the upper part of the lowermost shaft support piece 7, and the downward movement of the shaft 6 is restricted.

At the intermediate portion of the shaft 6, a locking rod 11 which also serves as an operating handle is rotatably supported by a pin 12 at its base end. On the other hand, a mounting plate 13 is fixed to the outer surface of the left door 5 so as to face the locking rod 11, and the mounting plate 13 has a pair of left and right fitting holes 14 and one through hole 15. Each is drilled. A first locking member 16 is provided on the front surface of the mounting plate 13.

As shown in FIG. 3, a pair of left and right fitting pins 17 are protruded from the rear surface of the first locking member 16, and the fitting pins 17 can be freely engaged and detached from the fitting holes 14 of the mounting plate 13. By fitting the first locking member 16 to the mounting plate 13, the first locking member 16 can be attached to and removed from the mounting plate 13.

Approximately in the center of the first locking member 16 is a connecting hole 1 that faces the through hole 15 and extends vertically.
8 is drilled. Moreover, this first locking member 1
Reinforcing ribs 19 are protruded from both left and right edges of the door 6, and a locking recess 20 is formed at the bottom of the door 6, and when the pair of doors 4 and 5 are closed, the locking rod 11 is held in place by the locking recess 20. It locks into the recess 20 to hold both doors 4 and 5 in a closed state.

A pin 2 is provided at the upper front surface of the first locking member 16.
1 through the collar 22 to the second locking member 23
is rotatably attached to the second locking member 23, and a projecting piece 24 that projects forward and can be placed above the locking recess 20 of the first locking member 16 is integrated into the lower part of the second locking member 23. It is formed. Further, locking protrusions 25 and 26 that protrude forward are integrally formed on the right side edges of each of the locking members 16 and 23, respectively, and the locking rod 11 is inserted into the locking recess 20 of the first locking member 16. The round hole 2 of each locking protrusion 25, 26 is locked and both locking members 16, 23 are overlapped.
By inserting the locking piece 28 of the lock 27 into the long hole 26a and the elongated hole 26a, both the locking members 16, 23 and the locking rod 11 can be locked inseparably.

A rotation shaft 29 having a D-shaped cross section is inserted into the left door 5 so as to pass through the through hole 15 of the mounting plate 13, the connection hole 18 of the first locking member 16, and the left door 5. A connecting protrusion 30 having a similar shape to the connecting hole 18 and a slightly smaller outer shape than the connecting hole 18 is integrally formed on the front end thereof,
It is arranged between each of the locking members 16 and 23. An operating handle 31 is inserted through the rear end of the rotation shaft 29 so as to be integrally rotatable at the end.
A rubber spacer 32 is inserted into the rotating shaft 29 between the operating handle 31 and the left door 5, and a rubber spacer 32 is inserted at the rear end of the rotating shaft 29 to prevent the operating handle 31 from falling off. A pair of nuts 33
is screwed on. Furthermore, as shown in FIGS. 1 and 4, a cylindrical connecting shaft 34 is welded and fixed to the rear surface of the operating handle 31 at the approximate center thereof, and an arrow 35 indicating the direction of rotation of the operating handle 31 is welded to the rear surface of the operating handle 31.
is attached.

As shown in FIGS. 1 and 4, when the operating handle 31 is placed in the substantially horizontal first position, the connecting protrusion 30 is connected to the connecting hole 18.
The first locking member 16, the mounting plate 13 and the left door 5 are engaged with the front surface of the first locking member 16 at the outer peripheral edge of the first locking member 16, and between the connecting protrusion 30 and the spacer 32,
is clamped, and the first locking member 16 is held in the attached state. Further, in this state, if the operating handle 31 is rotated in the direction indicated by the arrow 35 and placed in the second position shown by the chain line in FIG.
can be matched with the connecting hole 18.

As shown in FIGS. 1 and 4, on the inner surface of the left door 5 outside the rotation range of the open end of the operating handle 31, a mounting piece 36 having a substantially U-shaped cross section is located in the middle. A cover body 39 having a substantially U-shaped cross section is rotatably attached to the mounting piece 36 at its base end by a pair of screws 37 and nuts 38 located on the same vertical axis. There is. A connecting shaft 3 of the operating handle 31 is provided on the inner wall of the front end of the cover body 39.
A connecting piece 40 that is removably fitted to the outside of the connecting piece 4 is attached. Furthermore, an arrow 41 is attached to the outer surface of the cover body 39 to indicate the direction in which the cover body 39 is operated. Then, the connecting piece 4 of the cover body 39
0 is fitted onto the connecting shaft 34 of the operating handle 31, the operating handle 31 is placed and held in the first horizontal position as shown in FIG. 31
Most of the area is covered. Note that the operation handle 3
A sheet 42 indicating operating procedures for the operating handle 31 and the like is pasted on the inner surface of the left door 5 above the terminal 1.

Next, the operation of the door opening/closing device configured as described above will be explained. Now, when the opening 2 of the box-shaped loading platform 1 is closed by the left and right doors 4 and 5 and both doors 4 and 5 are locked, as shown in FIG. Operation handle 3
Based on the connection with the first connecting shaft 34, the emergency operation handle 31 is placed in a substantially horizontal first position, and the connecting protrusion 30 is placed in the first position as shown in FIGS.
At the same time, the pair of fitting pins 17 of the first locking member 16 are fitted into the fitting holes 14 of the mounting plate 13, and the first
A locking member 16 is attached and held on the left door 5. Further, the locking rod 11 on the right door 4 is engaged with the locking recess 20 of the first locking member 16 shown in FIG. It is arranged above the locking rod 11.

In this state, when opening the left and right doors 4, 5 from inside the box-shaped loading platform 1, each member is operated according to the operating procedure on the paper 42 shown in FIG. That is, the cover body 39 is rotated counterclockwise in FIG. 1 to disconnect the connecting piece 40 from the connecting shaft 34 of the operating handle 31. Next, rotate the emergency operation handle 31 in the direction indicated by the arrow 35,
It is placed and held in the second position shown in dashed lines in FIG.
As a result, the connecting protrusion 30 is rotated together with the shaft 29, and as shown by the chain line in FIG. The locking member 16 can be made detachable from the mounting plate 13.

Next, by strongly pressing both doors 4 and 5 from the inside to the outside, a force is applied to the first locking member 16 via the locking rod 11 in the direction of separating it from the mounting plate 13. , each fitting pin 17 is inserted into the fitting hole 1 by the force.
I was forced to leave from 4. As a result, both doors 4 and 5
The locked state is released. Also, based on the pressing force from inside against the doors 4 and 5, a rotational force is applied to the shaft 6 in the direction in which the locking claw 8 disengages from the locking protrusion 9, and the right door 4 is rotated. The lock is released. Therefore, both doors 4 and 5 can be easily opened from inside the loading platform 1.

As described above, in this embodiment, if a person is accidentally trapped in the accommodation chamber of the box-shaped cargo platform 1, the box-shaped cargo platform 1 can be removed by performing the above-mentioned operation.
You can easily escape from within.

Further, in this embodiment, when the cover body 39 is placed in the position shown in FIG.
Based on the engagement of the connecting piece 40 with the operating handle 3
1 is fixed covered with the cover body 39, so even if a loaded object in the loading platform 1 or a person handling it interferes with the cover body 39, the operating handle etc. will not be operated incorrectly, so it is safe. . Furthermore, due to the engagement between the connecting shaft 34 and the connecting piece 40, the operating handle 31 is reliably positioned without wobbling, so that fatigue of each member related to the operating handle 31 can be reduced as much as possible. The durability of the material is improved.

Furthermore, since the operating handle 31 is in a horizontal state in the first position and cannot be moved to the second position unless the operating handle 31 is rotated upward, even if the cover body 39 comes off, the placed object etc. Therefore, the operating handle 31 is not rotated to the second position.

(Another Embodiment) Next, another embodiment embodying this invention will be described with reference to FIGS. 5 to 7. This other embodiment differs from the previous embodiment in the configuration of the connecting protrusion and the emergency operation handle 31. That is, a columnar protrusion 50 is integrally formed on the rear surface of the first locking member 16, and a connecting protrusion 30 extending vertically is integrally formed at the tip thereof. A spacer 32 is fitted into the columnar protrusion 50. On the other hand, the operating handle 31 has a square connecting hole 51 extending in the longitudinal direction.

Therefore, when the first locking member 16 is attached to the mounting plate 13, as shown in FIG.
The connecting protrusion 30 projects inward of the left door 5,
The connecting protrusion 30 is disposed relative to the outer periphery of the connecting hole 51 of the operating handle 31 placed in a horizontal first position.

Therefore, in this other embodiment as well, the doors 4 and 5 can be easily opened from the inside by operating the cover body 39, operating handle 31, etc. in the same manner as in the previous embodiment. Model carrier 1
People trapped inside can easily escape.

Effects of the invention As detailed above, this invention provides the following excellent effects.

That is, even if a person is accidentally trapped in the storage room, the pair of doors can be opened with a simple operation.

In addition, normally, when the connecting piece of the cover body is engaged with the operating member, the operating member and the cover body are not moved in the direction of gravity. Therefore, the locking member will not come off inadvertently from the door.

Further, due to the engagement between the operating member and the connecting piece of the cover body, the operating member is reliably positioned without wobbling, so that the durability of the entire device including the operating member is improved.

[Brief explanation of the drawing]

Figures 1 to 4 show an embodiment of this invention, in which Figure 1 is an exploded perspective view of the main parts of the door opening/closing device, Figure 2 is a partial perspective view of the door in the closed state, and Figure 2 is a partial perspective view of the door opening and closing device. FIG. 3 is a sectional view of the main part of the door opening/closing device, and FIG. 4 is a similarly reduced rear view. 5 to 7 show another embodiment embodying this invention, in which FIG. 5 is an exploded perspective view of the main part of the door opening/closing device, and FIG.
The figure is a partial sectional view of the door opening/closing device, and FIG. 7 is a similarly reduced rear view. In the figure, 4 is the right door, 5 is the left door, 11
16 is a locking rod, 16 is a first locking member, 31 is an emergency operation handle, 39 is a cover body, and 40 is a connecting piece.

Claims (1)

[Claims for Utility Model Registration] 1. A pair of doors 4 that are openably and closably attached to both side edges of the opening 2 of the storage chamber, and close the opening 2 when joined to each other at opposing edges;
Of both doors 4 and 5, a locking rod 11 is provided on the outer surface of one door 4, and a locking rod 11 is provided on the outer surface of the other door 5 to lock and hold the locking rod 11. In a door opening/closing device that is provided with a locking member 16 and locks a pair of doors 4 and 5 in a closed state by engagement of both doors 11 and 16, the locking member 16 is removably attached to the other door 5, and the locking member 16 is detachably attached to the other door 5. The inner surface of the door 5 has a first position where the locking member 16 is held attached to the door 5, and a second position where the locking member 16 can be detached from the door 5. An operating member 31 is provided, which is movable between the two, and which is horizontal in a first position and is moved to a second position by moving upward from the first position, and covers the operating member 31. and a cover body 39 for holding the operating member 31 in the first position.
a connecting piece that is rotatably connected to the door 5 outside the movement range of the operating member 31 and in a direction perpendicular to the moving surface of the operating member 31, and that is detachable from the operating member 31 on the cover body 39; 40 is provided. 2. One of the locking member 16 and the operating member 31 is provided with a connecting hole 18, and the other is provided with a protrusion 30 that penetrates the connecting hole 18 and engages and disengages from the outer peripheral edge of the connecting hole 18. When the locking member 16 is placed in the first position, the locking member 16 is
and the operating member 31 is connected and fixed to the door 5, and the second
When the door opening/closing device is placed in the position, the projection 30 is detached from the outer peripheral edge of the connecting hole 18 and the connection between these 16 and 31 is released. .